![]() The impression gives a negative reproduction of these tissues. After setting, the impression is removed from the mouth and is used to make a replica of the oral tissues. In making an impression, a material in the plastic state is placed against the oral tissues to set. The function of an impression material is to record accurately the dimensions of oral tissues and their spatial relationships. Describe the important characteristics of digital impression systems.Ĭomputer-aided design/computer-aided manufacturing (CAD/CAM) List the advantages of a hydrophilic elastomeric impression material.Ģ2. Describe the properties of alginate substitute impression materials.Ģ1. Describe the important properties of elastomeric bite registration materials.Ģ0. List the various methods of disinfection of impressions and their impact on the accuracy.ġ9. Describe the hand mixing of elastomeric impression materials and the auto-mixing of addition silicones and polyethers.ġ8. List which die or model materials are compatible with the various impression materials.ġ7. Compare the properties of the four major elastomeric impression materials, and indicate their clinical applications.ġ6. Describe the setting of alginate impressions.ġ5. Describe the advantages and disadvantages of alginate hydrocolloid impression materials.ġ4. Compare the properties of hydrocolloid and elastomeric impression materials.ġ3. Describe the proper handling and storing of an alginate impression.ġ2. Describe the procedure for taking an upper and lower impression in alginate.ġ1. Describe the proper loading of alginate into the tray.ġ0. Describe the proper dispensing and mixing of an alginate.ĩ. Describe how a tray may be modified for an alginate impression.Ĩ. List the factors to be considered when selecting a tray for an alginate impression of the upper and lower arch.ħ. List the five objectives for alginate impressions.Ħ. ![]() List the components in an alginate powder, and describe their function.ĥ. List the requirements for an ideal impression material.Ĥ. Describe the relationship between a tooth, an impression of the tooth, and the die.ģ. Describe the function of an impression material.Ģ. ![]()
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